So the way the calculator does the RAID-5 parity calculations is in essence RAID-50. For example, let’s say we need 32 1TB disks to meet the capacity. To use a RAID-5 5+1 parity grouping, I need 7 sets of RAID-5 5+1 parity groups (or 42 disks). They are in essence either concatenated together or striped together to form the LUN. If they are striped than that would be RAID-0.